Use CheckedNumeric for strength calculation.
Update the calculation of the outlines bold strength to use a CheckedNum instead of an int.
BUG=chromium:639506
Review-Url: https://codereview.chromium.org/2296193002
diff --git a/core/fxge/ge/cfx_facecache.cpp b/core/fxge/ge/cfx_facecache.cpp
index c35830f..d59ae32 100644
--- a/core/fxge/ge/cfx_facecache.cpp
+++ b/core/fxge/ge/cfx_facecache.cpp
@@ -14,6 +14,7 @@
#include "core/fxge/include/cfx_pathdata.h"
#include "core/fxge/include/cfx_substfont.h"
#include "core/fxge/include/fx_freetype.h"
+#include "third_party/base/numerics/safe_math.h"
#ifdef _SKIA_SUPPORT_
#include "third_party/skia/include/core/SkStream.h"
@@ -154,19 +155,17 @@
uint32_t index = (weight - 400) / 10;
if (index >= CFX_Font::kWeightPowArraySize)
return nullptr;
- int level = 0;
- if (pSubstFont->m_Charset == FXFONT_SHIFTJIS_CHARSET) {
- level =
- CFX_Font::s_WeightPow_SHIFTJIS[index] * 2 *
- (FXSYS_abs((int)(ft_matrix.xx)) + FXSYS_abs((int)(ft_matrix.xy))) /
- 36655;
- } else {
- level =
- CFX_Font::s_WeightPow_11[index] *
- (FXSYS_abs((int)(ft_matrix.xx)) + FXSYS_abs((int)(ft_matrix.xy))) /
- 36655;
- }
- FXFT_Outline_Embolden(FXFT_Get_Glyph_Outline(m_Face), level);
+ pdfium::base::CheckedNumeric<signed long> level = 0;
+ if (pSubstFont->m_Charset == FXFONT_SHIFTJIS_CHARSET)
+ level = CFX_Font::s_WeightPow_SHIFTJIS[index] * 2;
+ else
+ level = CFX_Font::s_WeightPow_11[index];
+
+ level = level * (FXSYS_abs(static_cast<int>(ft_matrix.xx)) +
+ FXSYS_abs(static_cast<int>(ft_matrix.xy))) /
+ 36655;
+ FXFT_Outline_Embolden(FXFT_Get_Glyph_Outline(m_Face),
+ level.ValueOrDefault(0));
}
FXFT_Library_SetLcdFilter(CFX_GEModule::Get()->GetFontMgr()->GetFTLibrary(),
FT_LCD_FILTER_DEFAULT);